Heroku-22, Heroku-24 and Heroku-26 stacks updated

Change effective on 20 October 2026

We have updated the heroku-22, heroku-24 and heroku-26 stacks to pick up security and bug fixes in upstream packages. The new base images for each stack will roll out automatically to the Common Runtime over the next 48 hours, followed by Private Spaces.

If you use Heroku’s default buildpack-powered build system/stacks, you don’t need to redeploy your app to receive these changes. For Cedar-generation apps, each time a dyno starts, the slug is overlaid on top of the most recent base image. For Fir-generation apps, the built image is rebased on top of the most recent base image.

If your app uses Heroku’s container stack, you must rebuild your app’s Docker image to pick up updates in the base image specified in your Dockerfile.

See this Dev Center article for an overview of the package versions available in each stack’s base image.

The Heroku-22 stack is deprecated and will reach end-of-life on April 30th, 2027. Upgrade to a newer stack as soon as possible. See the Heroku-22 End-Of-Life FAQ for more details.

Changelog of packages

Stack: heroku-22

  • Updated ca-certificates from version 20260601~22.04.1 to 20260816ubuntu0.22.04.1
  • Updated liblzma5 from version 5.2.5-2ubuntu1.1 to 5.2.5-2ubuntu1.2
  • Updated xz-utils from version 5.2.5-2ubuntu1.1 to 5.2.5-2ubuntu1.2

Updates to packages available at build time only

  • Updated liblzma-dev from version 5.2.5-2ubuntu1.1 to 5.2.5-2ubuntu1.2

Stack: heroku-24

  • Updated ca-certificates from version 20260601~24.04.1 to 20260816ubuntu0.24.04.1
  • Updated liblzma5 from version 5.6.1+really5.4.5-1ubuntu0.3 to 5.6.1+really5.4.5-1ubuntu0.4
  • Updated xz-utils from version 5.6.1+really5.4.5-1ubuntu0.3 to 5.6.1+really5.4.5-1ubuntu0.4

Updates to packages available at build time only

  • Updated liblzma-dev from version 5.6.1+really5.4.5-1ubuntu0.3 to 5.6.1+really5.4.5-1ubuntu0.4

Stack: heroku-26

  • Updated ca-certificates from version 20260601~26.04.1 to 20260816ubuntu0.26.04.1
  • Updated liblzma5 from version 5.8.3-1 to 5.8.3-1ubuntu0.1
  • Updated xz-utils from version 5.8.3-1 to 5.8.3-1ubuntu0.1

Updates to packages available at build time only

  • Updated liblzma-dev from version 5.8.3-1 to 5.8.3-1ubuntu0.1